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JACOB K. NELSON, OF GREENPOI NT, NEW YORK. Letters Patent No. 63,741, dated April 9, 1867.

IMPROVED SCREW-GUTTER.

TO ALL WHOM IT MAY CONOERN:

Bc it known that I, JACOB K. NELSON, of Greenpoint, in the county ot' Kings, and State of` New York, have invented a certain new and useful improvement on Screw-Cutting Devices, applicable also to other purposes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in wh'ichi i Figure l represents a partly sectional longitudinal view of a ratchet wrench, with my improvement applied to it, as constructed or arranged for cutting screw-threads on a pipe or rod.

Figure 2, a transverse sectional view of the detachable socket fitted as if and shown in the act of severing n. pipe; and f Figure 3, a similar view of said socket fitted as for -unscrewing or screwing up work.

Like letters indicate like parts throughout the several figures.

The nature. of my invention consists in a novel construction of detachable sockets applicable mainly to ratchet wrenches, and provided with loose or detachable chasers, or cutters,l or grippers, according to the purpose the tool is designed to be applied to, and separately adjustable in radial directionswithin thc socket from the outside of the head of the wrench.

Referring' to the accompanying drawing, A represents the handle or stock of a ratchet wrench; B its revolving head, and C its double catch or pawl, which 'should be made slotted to permit of the passage through it,-as the head revolves, of projecting ends or heads of. screws, a, entered radially through the revolving head. D is the detachable socket, tting `and locking, it may be, by screws fitting holes b and projections c within, or so as to form a revolving attachment to the revolving head B. This socket D is tittcd, if for cutting a screwthread, on the outside of a pipe, with loose and detachable radial chaseils, E, and preferably with intermediate similarly fitted steadying blocks F, all of which are adjustable inwards to take their hold on the pipe by the screws a, and which may be so set to act on dilfercnt diameters of pipe without removing the socket, or the latter may be taken out of the revolving head and other chasers and steadying blocks substituted, according to the pitch of the screw to be cut. Being loose and detachable these chasers and steadying blocks may readily be changed, and being small and cheap, or simple devices, Va'large number of them may be furnished a wrench without materially adding to the cost, as compared with separate necessary sockets having the chasing surfaces on them. Furthermore, instead of the chasers and steadying blocks having screw-threads en them,'a similar shaped block, Gn,` having a dividing cutter formation, d, and constituting a positivevcuttcr, may be inserted in one of the radial slots e of the socket and plain-faced steadying or griping blocks H in the other radial slots f; thereof, for severing a pipe, as represented in tig. 2; or the radial slots e may bc fitted wholly with griping blocks, as represented ing. 3, for screwing or unscrewing work, all of such blocks, whether chas-ers, dividing cutters, or mere grippers, being radially adjustable by the screws a, andbcing separate and detachable devices to or within the socket D.

A tool thusconstructed, provided, and operated, will be found serviceable in numerous instances where space t0 Work a regularscrew-cutter, divider, or screw-wrench is contracted, and being so readily convertible to perform different functions or oices, will be a desidcratum in a variety of trades. l

WhatrI claim as my invention, and desire to secure by `Letters Patent, is-

In combination with the revolving head B the detachable socket D, fitted with loose or detachable blocks E F G or H, forming chasers, cutters, stcadying block-s or grippers, and made capable of radial adjustment from the outside of the revolving head of the hand tool or wrench, substantially as and for the purposes herein f th. Set 0r JACOB K. NELSON.

Witnesses: Y

J. W. CooMBs, G. W. REED. 

